Caligus is a genus of sea lice in the family Caligidae. The species are parasites of marine fishes and could be vectors of viruses. , the World Register of Marine Species includes the following species:
Caligus absens Ho, Lin & Chen, 2000
Caligus acanthopagri Lin, Ho & Chen, 1994
Caligus aduncus Shen & Li, 1959
Caligus aesopus C. B. Wilson, 1921
Caligus affinis Heller, 1866
Caligus afurcatus C. B. Wilson, 1913
Caligus alaihi A. G. Lewis, 1968
Caligus amblygenitalis Pillai, 1961
Caligus antennatus Boxshall & Gurney, 1980
Caligus apodus (Brian, 1924) Caligus arii Bassett-Smith, 1898 Caligus ariicolus C. B. Wilson, 1928 Caligus asperimanus Pearse, 1951 Caligus asymmetricus Kabata, v Caligus atromaculatus C. B. Wilson, 1913 Caligus balistae Steenstrup & Lütken, 1861 Caligus belones Krøyer, 1863
Caligus berychis C. B. Wilson, 1935
Caligus biaculeatus Brian, 1914
Caligus bicycletus Heegaard, 1945
Caligus bifurcus Shen, 1958
Caligus biseriodentatus Shen, 1957
Caligus bocki Heegaard, 1943
Caligus bonito C. B. Wilson, 1905
Caligus brevicaudatus A. Scott, 1901
Caligus brevicaudus Pillai, 1963
Caligus brevipedis Bassett-Smith, 1896
Caligus brevis Shiino, 1954
Caligus buechlerae Hewitt, 1964
Caligus callaoensis Duran, 1980
Caligus callyodoni Prabha & Pillai, 1986
Caligus calotomi Shiino, 1954
Caligus carangis Krøyer, 1863
Caligus centrodonti Baird, 1850
Caligus chamelensis
Caligus cheilodactyli Krøyer, 1863
Caligus chelifer C. B. Wilson, 1905
Caligus chiastos Lin & Ho, 2003
Caligus chorinemi Krøyer, 1863
Caligus chrysophrysi Pillai, 1985
Caligus clavatus Kirtisinghe, 1964
Caligus clemensi Parker & Margolis, 1964
Caligus confusus Pillai, 1961
Caligus constrictus Heller, 1865
Caligus cookeoli Ho & Lin, 2010
Caligus cordiventris Shiino, 1952
Caligus cordyla Pillai, 1963
Caligus cornutus Heegaard, 1962
Caligus coryphaenae Steenstrup & Lütken, 1861
Caligus cossacki Bassett-Smith, 1898
Caligus costatus Shen & Li, 1959
Caligus cresseyorum Kabata, 1992
Caligus crusmae Castro-Romero & Baeza-Kuroki, 1982
Caligus cunicephalus Gnanamuthu, 1950
Caligus curtus O. F. Müller, 1785
Caligus cybii Bassett-Smith, 1898
Caligus dactylopteni Uma Devi & Shyamasundari, 1981
Caligus dakari Beneden, 1892
Caligus dampieri Byrnes T., 1987
Caligus dasyaticus Rangnekar, 1957
Caligus debueni Stuardo & Fagetti, 1961
Caligus deformis Brian, 1924
Caligus diaphanus von Nordmann, 1832
Caligus dicentrarchi Cabral & Raibaut, 1986
Caligus dieuzeidei Brian, 1933
Caligus digitatus Ho & Lin, 2003
Caligus dubius T. Scott, 1894
Caligus eleutheronemi Shen, 1957
Caligus elongatus von Nordmann, 1832
Caligus engraulidis Barnard, 1948
Caligus enormis C. B. Wilson, 1913
Caligus epidemicus Hewitt, 1971
Caligus epinepheli Yamaguti, 1936
Caligus equulae Ho & Lin, 2003
Caligus evelynae Suárez-Morales, Camisotti & Martín, 2012
Caligus eventilis Leigh-Sharpe, 1934
Caligus fistulariae Yamaguti, 1936
Caligus flexispina A. G. Lewis, 1964
Caligus fortis Kabata, 1965
Caligus fronsuganinus Shen, 1940
Caligus fugu (Yamaguti, 1936) Caligus furcisetifer Redkar, Rangnekar & Murti, 1949 Caligus glacialis Gadd, 1910 Caligus glandifer Shiino, 1954